Small-sized double-resonant antenna

Abstract

The utility model relates to the technical field of antennas, and particularly discloses a small-sized double-resonant antenna, which comprises a clearance area, a parting radiation unit, a first radiator, a second radiator, a metalized via hole, a dielectric substrate and a PCB (printed circuit board) mainboard, the parting radiation unit is composed of a parting radiation body, a first connector and a second connector, the first radiator is composed of a first bonding pad and a first radiation branch knot, and the second radiator is composed of a second bonding pad and a second radiation branch knot; according to the utility model, the parting technology is adopted, the size of the dual-resonant antenna is reduced to a theoretical size which is 1 / 20 wavelength and is far smaller than 1 / 2 wavelength, the dual-resonant antenna scheme does not need a high-dielectric constant material as a dielectric substrate, complex processes such as plate edge copper plating and the like are not needed, the antenna cost is greatly reduced, and the dual-resonant antenna is realized by adopting two groups of radiation branch knots; and the dual-resonant antenna can be independently adjusted, and the application is flexible and convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to antenna technical field, concretely relates to a small double-resonance antenna. BACKGROUND

[0002] Double-resonance antenna is a kind of antenna type with special design, and its main feature is that its radiation part has two resonance structures, which makes the antenna can work in two different frequency bands at the same time, double-resonance antenna is designed with two different lengths of resonance branch (or called resonator), so that the antenna can produce resonance in two frequency bands respectively. One of the resonance branches is usually grounded, and the other resonance branch is fed through a coaxial line or a microstrip line, forming a double-resonance mode. This design enables the antenna to cover two frequency bands simultaneously, improving the flexibility and application range of communication equipment.

[0003] However, the double-resonance antenna in the prior art is relatively long in size, and requires complex processes such as copper plating on the edge of the board, greatly increasing the cost of manufacturing the double-resonance antenna. Therefore, a small double-resonance antenna is proposed. SUMMARY

[0004] The utility model aims at providing a small double-resonance antenna to solve the problem of the double-resonance antenna in the prior art being relatively long in size and requiring complex processes such as copper plating on the edge of the board, greatly increasing the cost of manufacturing the double-resonance antenna.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A small double-resonance antenna includes a clearance area, a split radiation unit, a first radiator, a second radiator, a metallized via, a dielectric substrate and a PCB mainboard. The split radiation unit is located on the top layer of the dielectric substrate. The split radiation unit is composed of a split radiation body, a first connector and a second connector. The first radiator is composed of a first solder pad and a first radiation branch. The second radiator is composed of a second solder pad and a second radiation branch. The PCB mainboard is composed of a radio frequency module, a microstrip line, a matching circuit, a connecting line and a double-resonance antenna. The double-resonance antenna is connected to the PCB board through a feed pad and a suspended pad.

[0007] The first radiator and the second radiator are located on the bottom layer of the dielectric substrate. The first connector and the first solder pad, and the second connector and the second solder pad are connected through metallized vias. The metallized vias pass through the connecting top layer and the bottom layer of the dielectric substrate. The dielectric substrate is made of insulating material. The material of the dielectric substrate is one of FR, foam and ceramic. The resonance points of the double-resonance are fine-tuned by the length and width of the first radiator and the second radiator.

[0008] It should be noted that: Figure 6and Figure 7 For the test results of the case, the case specific size: the size of the small dual-resonance antenna is a cubic structure of 7*3*2mm, the thickness is 2mm, FR4 is used as the dielectric substrate, the type of the radiation unit is Hilbert curve, the line width and the spacing are 0.1mm and 0.3mm, the first connector, the second connector, the first pad and the second pad are all rectangular with 1mm*2.2mm, the first radiator and the second radiator are rectangular with 1.6mm*2.0mm and 1.3mm*1.3mm respectively, from Figure 6 It can be seen from the reflection coefficient curve of the dual-resonance antenna that the resonant frequency of the dual-resonance antenna covers 2400-2500MHz and 5150-850MHz, and S11 is less than 10Db; from Figure 7 It can be seen from the radiation efficiency diagram of the dual-resonance antenna that the average radiation efficiency of the dual-resonance antenna band can reach 45% and 65%, and the size of the dual-resonance antenna is less than 1 / 10 of the wavelength, and the thickness is less than 1 / 30 of the wavelength, so that the dual-resonance antenna with extremely small size is realized;

[0009] As can be seen from the above, the application can be widely applied to various compact products, and is especially helpful for 2.4G single-frequency WiFi, 5G single-frequency WiFi, 2.4G and 5G dual-frequency WiFi, Bluetooth, Zigbee and Sub1G antenna requirements. For example, the corresponding white goods such as refrigerators, washing machines, televisions, routers, rice cookers and the like, as well as mobile phones, watches, code scanning machines and other small-sized products require omni-directional transmission of wireless signals.

[0010] The application adopts the splitting technology, and the size of the dual-resonance antenna is reduced to 1 / 20 of the wavelength, which is much smaller than the theoretical size of 1 / 2 of the wavelength. The dual-resonance antenna scheme does not need high dielectric constant materials as the dielectric substrate, and does not need complex processes such as copper plating on the edges of the board, thereby greatly reducing the cost of the antenna. Two groups of radiation branches are adopted to realize the dual-resonance antenna, and the dual-resonance antenna is independently adjustable and flexible to apply.

[0011] Compared with the prior art, the application has the following beneficial effects:

[0012] The application adopts the splitting technology, and the size of the dual-resonance antenna is reduced to 1 / 20 of the wavelength, which is much smaller than the theoretical size of 1 / 2 of the wavelength. The dual-resonance antenna scheme does not need high dielectric constant materials as the dielectric substrate, and does not need complex processes such as copper plating on the edges of the board, thereby greatly reducing the cost of the antenna. Two groups of radiation branches are adopted to realize the dual-resonance antenna, and the dual-resonance antenna is independently adjustable and flexible to apply. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a top view structure diagram of the dual-resonance antenna of the application;

[0014] Figure 2 is a bottom view structural diagram of the dual-resonance antenna of the utility model;

[0015] Figure 3 is a side view structural diagram of the dual-resonance antenna of the utility model;

[0016] Figure 4 is a structural diagram of the PCB block diagram of the utility model;

[0017] Figure 5 is a sectional view structural diagram of the PCB block of the utility model;

[0018] Figure 6 is a structural diagram of the reflection coefficient curve diagram of the utility model;

[0019] Figure 7 is a structural diagram of the radiation efficiency of the utility model.

[0020] In the figure: 1, dual-resonance antenna; 1-1, split radiation unit; 1-2, first radiator; 1-3, second radiator; 1-4, metallized via; 1-5, dielectric substrate; 1-6, first connector; 1-7, second connector; 1-8, split radiator; 1-9, first solder pad; 1-10, first radiation branch; 1-11, second solder pad; 1-12, second radiation branch; 2, connecting line; 3, clearance area; 4, matching circuit; 5, microstrip line; 6, radio frequency module; 7, PCB mainboard; 8, feed solder pad; 9, suspended solder pad. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, a small dual-resonance antenna includes a clearance area 3, a split radiation unit 1-1, a first radiator 1-2, a second radiator 1-3, a metalized via 1-4, a dielectric substrate 1-5, and a PCB mainboard 7, the split radiation unit 1-1 is located on the top layer of the dielectric substrate 1-5, the split radiation unit 1-1 is composed of a split radiation body 1-8, a first connector 1-6 and a second connector 1-7, the first radiator 1-2 is composed of a first solder pad 1-9 and a first radiation branch 1-10, the second radiator 1-3 is composed of a second solder pad 1-11 and a second radiation branch 1-12, the PCB mainboard 7 is composed of a radio frequency module 6, a microstrip line 5, a matching circuit 4, a connecting line 2 and the dual-resonance antenna 1, and the dual-resonance antenna 1 is connected with the PCB mainboard 7 through a feeding solder pad 8 and a suspended solder pad 9;

[0023] The first radiator 1-2 and the second radiator 1-3 are located on the bottom layer of the dielectric substrate 1-5, the first connector 1-6 and the first solder pad 1-9 and the second connector 1-7 and the second solder pad 1-11 are connected through the metalized via 1-4, the metalized via 1-4 penetrates the connecting top layer and the bottom layer of the dielectric substrate 1-5, the dielectric substrate 1-5 is provided by an insulating material, the material of the dielectric substrate 1-5 is one of FR4, foam and ceramic, and the resonance point of the dual-resonance 1 is fine-tuned by the length and width of the first radiator 1-2 and the second radiator 1-3.

[0024] It should be noted that: Figure 6 And Figure 7 The test results of the implementation case are as follows: the size of the small dual-resonance antenna 1 is a cubic structure with a size of 7*3*2mm, the thickness is 2mm, FR4 is used as the dielectric substrate 1-5, the split radiation unit 1-1 is a Hilbert curve, the line width and the spacing are 0.1mm and 0.3mm, the first connector 1-6, the second connector 1-7, the first solder pad 1-9 and the second solder pad 1-11 are all rectangular with a size of 1mm*2.2mm, and the first radiator 1-2 and the second radiator 1-3 are rectangular with a size of 1.6mm*2.0mm and 1.3mm*1.3mm respectively. Figure 6 As can be seen from the reflection coefficient curve of the small dual-resonance antenna 1, the resonant frequency of the dual-resonance antenna 1 covers 2400-2500MHz and 5150-850MHz, and S11 is less than -10Db. Figure 7 As can be seen from the radiation efficiency diagram of the small dual-resonance antenna 1, the average radiation efficiency of the dual-resonance antenna 1 can reach 45% and 65%, and the size of the dual-resonance antenna 1 is less than 1 / 10 of the wavelength, and the thickness is less than 1 / 30 of the wavelength, so that the dual-resonance antenna 1 with extremely small size is realized.

[0025] As can be seen from the above, the application can be widely applied to various compact product single-frequency antenna and dual-frequency antenna demand occasions, especially important for 2.4G single-frequency WiFi, 5G single-frequency WiFi, 2.4G and 5G dual-frequency WiFi, and Bluetooth, Zigbee and Sub1G antenna demand. For example, white goods such as refrigerators, washing machines, televisions, routers, rice cookers, and other small-sized products such as mobile phones, watches, and code scanners that require omni-directional transmission of wireless signals.

[0026] The utility model discloses a split technology is adopted, and the size of double resonance antenna 1 is reduced to 1 / 20 wavelength, far less than the theoretical size of 1 / 2 wavelength, and double resonance antenna 1 scheme does not need high dielectric constant material as dielectric substrate 1-5, simultaneously does not need plate edge plating copper and other complex technology, greatly reduces antenna cost, and realizes double resonance antenna 1 with two groups of radiation branches, and double resonance antenna 1 can be independently adjustable, and application is flexible and convenient.

[0027] Further, the design application is applied to a double resonance antenna, a split technology is adopted, and the size of double resonance antenna 1 is reduced to 1 / 20 wavelength, far less than the theoretical size of 1 / 2 wavelength, and double resonance antenna 1 scheme does not need high dielectric constant material as dielectric substrate 1-5, simultaneously does not need plate edge plating copper and other complex technology, greatly reduces antenna cost, and realizes double resonance antenna 1 with two groups of radiation branches, and double resonance antenna 1 can be independently adjustable, and application is flexible and convenient.

[0028] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric welding connection;Can be direct connection, also can indirectly connect through intermediate medium, can be the intercommunication of two elements or the interaction of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0029] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature, or it can simply mean that the first feature is higher in horizontal height than the second feature. The first feature can be directly below or obliquely below the second feature, or it can simply mean that the first feature is lower in horizontal height than the second feature.

[0030] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0031] The utility model discloses the embodiment in the drawing, only relate to the structure involved in the embodiment of the disclosure, other structures can refer to the usual design, under the condition of not conflicting, the same embodiment and different embodiments of the utility model can be combined mutually.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A compact dual-resonance antenna, characterized by, The application relates to a double-resonance antenna, which comprises a clearance area (3), a split radiation unit (1-1), a first radiator (1-2), a second radiator (1-3), a metalized via (1-4), a dielectric substrate (1-5) and a PCB mainboard (7), wherein the split radiation unit (1-1) is located on the top layer of the dielectric substrate (1-5), the split radiation unit (1-1) is composed of a split radiation body (1-8), a first connector (1-6) and a second connector (1-7), the first radiator (1-2) is composed of a first pad (1-9) and a first radiation branch (1-10), the second radiator (1-3) is composed of a second pad (1-11) and a second radiation branch (1-12), the PCB mainboard (7) is composed of a radio frequency module (6), a microstrip line (5), a matching circuit (4), a connecting line (2) and the double-resonance antenna (1), the double-resonance antenna (1) is connected with the PCB mainboard (7) through a feeding pad (8) and a suspended pad (9).

2. A compact dual-resonance antenna according to claim 1, characterized in that: The first radiator (1-2) and the second radiator (1-3) are located on the bottom layer of the dielectric substrate (1-5).

3. A compact dual resonant antenna according to claim 1, characterized in that: The first connector (1-6) and the first pad (1-9) and the second connector (1-7) and the second pad (1-11) are connected through the metalized via (1-4).

4. A compact dual resonant antenna according to claim 1, characterized in that: The metalized via (1-4) penetrates the connecting top layer and the bottom layer of the dielectric substrate (1-5).

5. A compact dual resonant antenna according to claim 1, characterized in that: The dielectric substrate (1-5) is made of an insulating material, and the material of the dielectric substrate (1-5) is one of FR4, foam and ceramic.

6. A compact dual resonant antenna according to claim 1, characterized in that: The resonance points of the double-resonance antenna (1) are fine-tuned through the length and width of the first radiator (1-2) and the second radiator (1-3).

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